Improvement in metal-turning lathes



MPEYERS, PHOTO-LITHOGRAPH ER, WASHINGTON D C NTED STATES HENRY M.`QUAoKENBUsE, or EEEKIMEE, NEW vonk.

IMPROVEMENT IN METAL-TURNING Ll- \THES.

Speccation forming part of Letters Patent No. l65,495, dated July 13,1875; application filed y May 2o, 187.5.

To all whom it may concern:

Be it known that I, HENRY M. QUACKEN- BUSH, of Herkimer, Herkimercounty, New York, have invented a certain Method ot' Ftting Arbors toLathes, &c.,rof which the following is a specification This inventionhas reference to the construction of the head-stock of turning-lathes orother analogous machines, or the method of mounting the arbor therein,the purpose of the invention being to obtain such a construction ofparts as will enable a tight and close bearing to be insured at alltimes with little labor and trouble, and to providea lathe at very smallcost. which the extreme simplicity of my plan enables me to do.

The drawings accompanying this specilication represent, in Figure l, acentral and lon gitudinal section of the head-stock of a lathecontaining` my improvements. Fig. 2 is a transverse section ot' thearbor and sleeve, and Fig. 3 is a section of a modified form ofconstruction.

In the drawings, A` represents the main frame of the head-stock ot' alathe, the same being, in form and size, as now7 generallyT in use,according to the character of the lathe to which it belongs, the frontstandard ot' the said head-stock being shown at B, and the rear one atG.

Heretofore, in the construction ot' headstocks of lathes, the twobearings of the arbor have been formed upon or naade part of such arbor,and inclosed in boxes, which require more or less fitting. In thisinvention the front or main bearing is part and lparcel of the pulley bywhich the arbor is driven, and, together with the pulley, is susceptibleof ready adjustment upon such arbor, the said bearing beingfrusto-conical or tapering, and received Wit-hin a corresponding socketor box, by which a close joint is preserved.

In carrying my invention into practice, in one simple form in which itsprinciple may be embodied, 1 provide rnyseltl with an arbor, D, which issimply a round piece of steel or iron, of the requisite diameter andlength, and I reduce one end of this arbor to a pointed pivot, a, andstep such pivot in a pocket, b, which may be simply countersunk in thestandard C; or, if greater nicety is required, may be ot' Babbitt metal,let into such standard. I next provide a pulley, E,whioh may be ot' anyform or character desired, and cast upon or affix to this pulley a hub,c,which I confine to the arbor by a set-screw, e, or by other means, andI then bore out the same to receive tightly the arbor D, andsubsequently turn down the periphery of the pulley concentrically withsuch arbor, at the saine time turning down the hub c to a conic frustum,d. I then bore out the standard B with a tapering seat to receive thebearing d, and the head-stock is complete.

Among the advantages attaching to my invention are the following: First,by simply loosening the screw c the pulley `E and arbor D may beremoved; and as this arbor may be composed of the shank of a drill orthe stem ot' a chuck, or may constitute part of some other tool, I amenabled to readily and i11- stantly withdraw one tool and substituteanother so long as the diameter ot' the shank or arbor does not varymaterially. Second, an important result reached by my invention is theeXtreme simplicity and cheapness of construction, as I avoid the nicetting usually required about the step at the rear end of the arbor.Third, owing to the length of the pulley E and vhub c, they stiften andstrengthen the arbor D, and I am enabled to use a smaller and lessexpensive piece ot' steelwhereof to make such arbor, thereby effectingone point ot' economy. Fourth, the only perceptible y wear upon thearbor is at its rear pivot, Which is very slight, and practically'nothing. Owing to the tapering form ot' the bearing or plug d a tightjoint is always preserved, and Vthe wear is very slow.

and capable ot' endwise adjustment upon said arbor, or secured to thearbor independent Aot the pulley, as shown in Fig. 3 of the drawings. v

I claim- D, whereby the tapering plug d of the hub is The constructionot parts, substantially as,A fitted toits seat, and advantages areobtained herein shown-*that is, constructing; the main essentially asstated.

bearing of a hub or sleeve, c, mounted ad- H. M. QUAGKENBUSH. ]'ustablyupon the arbor D, or secured to or Witnesses:

making part of the pulley E, and both sus- S. W. LINTS,

ceptible of endwise adjustment upon the arbor M. W. RASBACH.

